# 混凝土
class Concrete:
    def __init__(self, fc, ftk, c0):
        self.fc = fc
        self.ftk = ftk
        self.c0 = c0


class Solution:
    def __init__(self, as1: float, as2: float, As1: float, As2: float, concrete: Concrete):
        self.as1 = as1
        self.as2 = as2
        self.As1 = As1
        self.As2 = As2
        self.concrete = concrete
